/*
 * File:        chromatable.js
 * Version:     1.3.0
 * CVS:         $Id$
 * Description: Make a "sticky" header at the top of the table, so it stays put while the table scrolls
 * Author:      Zachary Siswick
 * Created:     Thursday 19 November 2009 8:53pm 
 * Language:    Javascript
 *
 */
 
 
 
(function($){
    
    $.chromatable = {
        // Default options
        defaults: {
            //specify a pixel dimension, auto, or 100%
            width: "100%", 
            height: "250px",
            scrolling: "yes" 
        }
				
    };
		
    $.fn.chromatable = function(options){
		 
        // Extend default options
        var options = $.extend({}, $.chromatable.defaults, options);

        return this.each(function(){
															
            // Add jQuery methods to the element
            var $this = $(this);
            var $uniqueID = $(this).attr("ID") + ("wrapper");
				
				
            //Add dimentsions from user or default parameters to the DOM elements
            $(this).css('width', options.width).addClass("_scrolling");
				
            $(this).wrap('<div class="scrolling_outer"><div id="'+$uniqueID+'" class="scrolling_inner"></div></div>');
								
            $(".scrolling_outer").css({
                'position':'relative'
            });
            $("#"+$uniqueID).css(
																	
            {
                    'border':'1px solid #CCCCCC',
                    'overflow-x':'hidden',
                    'overflow-y':'auto',
                    'padding-right':'17px'
                });
				
            $("#"+$uniqueID).css('height', options.height);
            $("#"+$uniqueID).css('width', options.width);
				
            // clone an exact copy of the scrolling table and add to DOM before the original table
            // replace old class with new to differentiate between the two
          /*  $(this).before($(this).clone().attr("id", "").addClass("_thead").css(
																																															 
            {
                    'width' : 'auto',
                    'display' : 'block', 
                    'position':'absolute', 
                    'border':'none', 
                    'border-bottom':'1px solid #CCC',
                    'top':'1px'
                }));
	*/
				
            // remove all children within the cloned table after the thead element
            $('._thead').children('tbody').remove();
				
				
            $(this).each(function( $this ){
															
                // if the width is auto, we need to remove padding-right on scrolling container	
					
                if (options.width == "100%" || options.width == "auto") {
						
                    $("#"+$uniqueID).css({
                        'padding-right':'0px'
                    });
                }
					
				
                if (options.scrolling == "no") {
												
                    $("#"+$uniqueID).before('<a href="#" class="expander" style="width:100%;">Expand table</a>');
						
                    $("#"+$uniqueID).css({
                        'padding-right':'0px'
                    });
						
                    $(".expander").each(
                        function(int){
                            $(this).attr("ID", int);
                            $( this ).bind ("click",function(){
                                $("#"+$uniqueID).css({
                                    'height':'auto'
                                });
                                $("#"+$uniqueID+" ._thead").remove();
                                $(this).remove();
                            });
                        });
                    //this is dependant on the jQuery resizable UI plugin
                    $("#"+$uniqueID).resizable({
                        handles: 's'
                    }).css("overflow-y", "hidden");
                }
            });
				
            // Get a relative reference to the "sticky header"
            $curr = $this.prev();
				
            // Copy the cell widths across from the original table
            $("thead:eq(0)>tr th",this).each( function (i) {
																							 
                $("thead:eq(0)>tr th:eq("+i+")", $curr).width( $(this).width());
					
            });

				
            //check to see if the width is set to auto, if not, we don't need to call the resizer function
            if (options.width == "100%" || "auto"){
											
                // call the resizer function whenever the table width has been adjusted
                $(window).resize(function(){
																			
                    resizer($this);										
                });
            }
        });
				
    };
		
    // private function to temporarily hide the header when the browser is resized
		
    function resizer($this) {
				
        // Need a relative reference to the "sticky header"
        $curr = $this.prev();
				
        $("thead:eq(0)>tr th", $this).each( function (i) {
																														 
            $("thead:eq(0)>tr th:eq("+i+")", $curr).width( $(this).width());
					
        });

    };
		
})(jQuery);